HP Pavilion 14-n200 won’t turn on at all, won’t start up, there is no display, won’t boot just a black screen, this is a general diagnostic and repair steps to fix your laptop and make it turn on again.

First case HP Pavilion 14-n200 wont turn on at all

HP Pavilion 14-n200 won’t turn on at all, when you plug the AC adapter into the laptop, there are no lights, charge led lights OFF. When you push on the power button, nothing happens, all led lights OFF, and there are no sounds. The laptop appears to be completely dead.

Possible problem:

The AC adapter failed; the battery has no charge left, the motherboard doesn’t receive any power from the AC Adapter. In this case test the AC adapter with a voltmeter. If it’s dead, replaced with a new one. (How to test AC adapter with voltmeter).

Static electric charge on the motherboard, Power circuit in wrong state; your laptop has static electric charge made power circuit in wrong state. Unplug AC adapter, take out the battery and hold power button for 30 seconds, the static charge will dissipate. Plug the AC Adapter and turn on the laptop (in some case you have to take out CMOS battery too).

Some electronics components on the motherboard failed, in most case the power jack failed or there are a short in some SMD capacitor or MOSFET directly after power jack. Test the Voltage and Continuity with a Voltmeter and check electronics components temperature with your finger. The failed electronic component has to be replaced.

BIOS failed, Laptop System Power (3V/5V) work fine, No electronics components have short or overheating and 3.3V on the power button, BIOS has to be reprogrammed (flash bios) or replaced. (How to reprogram Laptop BIOS).

Motherboard failure. The motherboard has to be replaced.

Second case HP Pavilion 14-n200 wont turn on, but the charge led light ON

Your HP Pavilion 14-n200 won’t start up but the Charge led lights ON, when you plug the AC Adapter into the laptop, Charge led lights ON, but when you push on the power button, nothing happens, Power led lights OFF, and there are no sounds, laptop won’t turn on.

Possible problem:

Static electric charge on the motherboard, Power circuits in wrong state; same procedure as first case, see second problem in first case above.

Some electronics components on the motherboard failed; Check electronics components continuity, Voltage and temperature with a voltmeter. Check Laptop Power System, you will need an electronic Schematic Diagram for Laptop HP Pavilion 14-n200. The failed electronic component has to be replaced. (How to test Laptop Power System).

Your HP Pavilion 14-n200 turns on, but there is no display. When you push on the power button the Power led lights ON, cooling fan works but nothing appears on the screen. The screen is completely black. There is no image on the screen at all.

Possible problem:

RAM or hardware failure; your HP Pavilion 14-n200 turns on, but there is no display just black screen with Power led light ON and Cooling Fan Work. It’s possible one of the memory modules (RAM) failed. In this case you can try cleaning and reseating memory modules to make sure they are making good contact with the slot. (How to clean or replace Laptop RAM). If reseating / replacing memory doesn’t help, try removing the hard drive, DVD drive, wireless card, keyboard, etc… In other words, disassemble the laptop to bare minimum and test again, replace the faulty hardware.

Screen faulty or bad video cable connection; your HP Pavilion 14-n200 turns on, but there is no display, screen is black, with Power led lights ON. Test the laptop with an external monitor connected to the VGA or HDMI port, if the external monitor works fine. In this case most likely you have a faulty screen or bad video cable connection. Check them and replace the faulty one. (How to replace laptop screen)

Processor failure; your HP Pavilion 14-n200 turns on, but without display. Test laptop with an external monitor connected to the VGA or HDMI port, if there is no display on the monitor, there is chance you have failed Processor, reseat or replace processor and test again. (How to replace Laptop processor).

BIOS failed; same procedure as first case, see fourth problem in first case above.

Some electronics components on the motherboard failed, same procedure as second case, see third problem in second case above.

Graphics Card failure; your HP Pavilion 14-n200 won’t boot, the laptop turn on but the screen is black. Test the laptop with an external monitor, if there is no display on the monitor, probably you have failed Graphics Card, try to repair graphic card with heat gun or replace it. (How to repair laptop graphic card).